Insulating sealing element for head-of-wall joints

ABSTRACT

An insulating strip is disclosed. The insulating strip includes a support layer and an insulating material strip secured to the support layer.

This application claims the benefit of U.S. Provisional Application No.61/905,706, filed Nov. 18, 2013, the disclosure of which is expresslyincorporated by reference herein.

BACKGROUND AND SUMMARY OF THE INVENTION

The present invention deals generally with the field of acoustical orfirestopping insulation for head-of-wall joints, including, possibly,intumescent components.

In the building construction trade, a head-of-wall joint (also sometimesreferred to as a top-of-wall joint) refers to the linear junction orinterface existing between a top section of a framing or wallboard wallassembly and the ceiling, where the ceiling may be a next-level floor orcorrugated pan roof deck, for example. Head-of-wall joints often presenta serious challenge in terms of reducing or preventing the spread ofsmoke and fire during a building fire. In this regard and in commonpractice, a wall to ceiling connection of many newly constructedbuildings consists essentially of metal framing assemblies. These metalframing assemblies are generally constructed from a plurality of metalframing members including studs, joints, trusses, and other metal postsand beams formed from sheet metal and frequently fabricated to have thesame general cross-sectional dimensions as standard members used forsimilar purposes. Although many cross-sectional shapes are available,the primary shapes used in building construction are C-shaped studs andU-shaped tracks. These C-shaped studs and U-Shaped studs may vary intheir size, which, however, are standardized. The steel track (orchannel) is configured to receive steel studs between the legs of theshaped channel. A wallboard is generally attached to at least one sideof the studs. The studs and wallboard are in many instances spaced apartfrom the ceiling a short gap distance in order to allow for ceilingdeflections caused by seismic activity or moving overhead loads. Trackand stud assemblies that allow for ceiling deflections are commonlyreferred to as dynamic head-of-wall systems. Exemplary steel stud wallconstructions may be found in U.S. Pat. Nos. 4,854,096 and 4,805,364both to Smolik, and U.S. Pat. No. 5,127,203 to Paquette. Exemplarydynamic head-of-wall systems having steel stud wall constructions may befound in U.S. Pat. No. 5,127,760 to Brady, and U.S. Pat. No. 6,748,705to Orszulak et al. Firestops are thermal barrier materials orcombinations of materials used for filling gaps and openings such as inthe joints between fire-rated walls and/or floors of buildings. Forexample, firestops can be used in walls or floors to prevent fire andsmoke from passing through the gaps or openings required for cables,pipes, ducts, or other conduits. Firestops are also used to fill jointgaps that occur between walls, between a ceiling and the head-of-walljoints.

So-called head-of-wall joints pose a number of challenges for thefireproofing industry. Walls are increasingly being made of gypsumwallboard affixed to a framework of metal studs capped by a horizontallyextending track. Ceilings are increasingly being made by pouringconcrete onto fluted steel. Although the distance between thehorizontally extending track at the top of the wall is often fixed inrelationship to the ceiling, the gypsum wallboards are subject toexpansion and contraction due to motion of other building components,ground settling, or other causes.

In order to contain the spread of smoke and fire, a fire resistantmaterial such as, for example, mineral wool is often times stuffed intothe gaps between the ceiling and wallboard (see, e.g., U.S. Pat. No.5,913,788 to Herren). For example, mineral wool is often stuffed betweena steel header track (e.g., an elongated U-shaped channel) and acorrugated steel roof deck (used in many types of steel and concretebuilding constructions); a fire resistant and generally elastomericspray coating is then applied onto the exposed mineral wool to therebyform a fire resistant joint seal (see, e.g., U.S. Pat. No. 7,240,905 toStahl). In certain situations where the ceiling to wallboard gap isrelatively small, a fire resistant and elastomeric caulk is commonlyapplied so as to fill any small gaps. In still another approach and asdisclosed in U.S. Pat. Nos. 5,471,805 and 5,755,066 both to Becker, aslidable non-combustible secondary wall member is fastened to anespecially configured steel header track and immediately adjacent to thewallboard. In this configuration, the secondary wall member provides afire barrier that is able to accommodate ceiling deflections. All ofthese approaches, however, are relatively labor intensive and thusexpensive.

Intumescent materials have long been used to seal certain types ofconstruction gaps such as, for example, conduit through-holes. In thisregard, intumescent and fire barrier materials (often referred to asfirestop materials or fire retardant materials) have been used to reduceor eliminate the passage of smoke and fire through openings betweenwalls and floors and the openings caused by through-penetrations (i.e.,an opening in a floor or wall which passes all the way through from oneroom to another) in buildings, such as the voids left by burning ormelting cable insulation caused by a fire in a modern office building.Characteristics of fire barrier materials suitable for typicalcommercial fire protection use include flexibility prior to exposure toheat, the ability to insulate and/or expand, and the ability to hardenin place upon exposure to fire (i.e., to char sufficiently to deter thepassage of heat, smoke, flames, and/or gases). Although many suchmaterials are available, the industry has long sought better and moreeffective uses of these materials and novel approaches for better fireprotection, especially in the context of dynamic head-of-wallconstruction joints and gaps.

Thus, and although construction joints and gaps are generally sealed insome manner (e.g., mineral wool and/or elastomeric coatings; see also,U.S. Patent Application No. 2006/0137293 to Klein), there are relativelyfew products and methods available that effectively and efficiently sealhead-of-wall construction joints and gaps to thereby significantlyenhance the ability of such joints and gaps to withstand smoke and firepenetration. In particular, there are very few products and methodsavailable that address the needs for adequate fire protection andsealing of dynamic head-of-wall systems associated with steel stud wallconstructions.

Recently more advanced head-of-wall fire block arrangements have beendeveloped based on fire block header tracks. These fire block headertracks utilize an expandable fire-resistant material, such as anintumescent material, applied along a length of the header track of awall assembly. The intumescent material is either positioned on the webof the header track, on the legs (hereinafter also referred to as aflange) of the header track or alternatively wraps around a corner ofthe header track, extending both along a portion of a web of the headertrack and a flange of the header track. The intumescent materialadvantageously is held in place between the web of the header track andthe floor or ceiling above the wall. When exposed to a sufficienttemperature, the intumescent material expands to fill gaps at thehead-of-wall. The portion of the intumescent trapped between the headertrack and the floor or ceiling ensures that the intumescent stays inplace as it expands and does not become dislodged as a result of theexpansion.

With the use of such fire-resistant material, the metal tracks oftenrequire a unique construction on the exterior surface of the metal trackwhich can have a predefined area such as a recess or the like whichidentifies the specific location required for placement of such anintumescent and/or acoustic layer of insulation material. In particular,as the joint moves responsive to normal expansion and contraction of thebuilding components, the insulating tape and/or the coatings ofinsulating material which is attached directly to the surfaces offlanges can become dislodged from components of the head-of-wall area,that is, particularly dislodging from the surfaces of the downwardlyextending side sections of the track or runner. Also these systems donot specifically address variations in the contour or profile of theceiling or roof area which comes into direct abutment with the upperportion of the metal track. Such variations in the configuration of thebuilding construction in this area can form gaps between the track andthe adjacent roof or ceiling area which are not adequately addressed forinsulation by the above described prior art systems.

A further significant disadvantage of the prior art head-of-wall fireblock arrangements is that they consist of an intumescent insulatingmaterial which expands up to ten times its normal thickness when exposedto sufficient heat. In order to achieve such high expansion, a materialcomprising additives, which additives cause the swelling of thematerial, must be used. These additives, however, are expansive makingthe insulating material expensive.

One of the advantages of the apparatus of the present invention is thatit is usable with conventionally OEM metal track construction and doesnot require any customized design for the ceiling runner, primarily,because the present construction works best when not attached in anymanner to the track side surfaces sections particularly where it isimportant to allow for some amount of relative movement therebetweenduring normal expansion and contraction of building materials andsections which occurs commonly. The inventors now have found out that itis not necessary to use an intumescent material as firestop material inorder to provide reliable fire prevention provided that the material isfire resistant, i.e., material must not burn away but builds a stableash crust.

It is an object of the sealing element for insulating head-of-walljoints of the present invention to effectively seal betweenconventionally designed metal track sections and the immediatelyadjacent roof or ceiling area for firestopping and/or acousticinsulating thereof.

It is an object of the sealing element for insulating head-of-walljoints of the present invention to be usable with conventional steelframing and gypsum board wall constructions.

It is an object of the sealing element for insulating head-of-walljoints of the present invention to be usable with floor or roofconstructions of any conventional construction including solid concreteor a composite material installed atop a corrugated steel deck.

It is an object of the sealing element for insulating head-of-walljoints of the present invention to prevent the spread of sound, noise,fire, super-heated gases, flames and/or smoke in these areas.

It is an object of the sealing element for acoustical and/or thermalinsulating head-of-wall joints of the present invention to provide moreeffective insulating by providing attachment of the insulating materialto the metal track only in the central upper portion thereof or at thelowermost edges of the track side walls without any attachmentwhatsoever to the surfaces of the downwardly extending track sidesections to facilitate insulating therearound irrespective of the normalexpansion and contraction of building structural components that takesplace over the time period prior to the occurrence of the fireconditions.

It is an object of the sealing element for insulating head-of-walljoints of the present invention to minimize cost and maintenancerequirements.

It is an object of the sealing element for insulating head-of-walljoints of the present invention to expedite installation and minimizelabor costs.

Many patents have been applied or granted for various constructions forinsulating head-of-wall joints as described above such as shown in U.S.Patent Application Publication No. 2011/247281 A1 published Oct. 13,2011 to Don A. Pilz et al. assigned to California Expanded MetalProducts Company on a “FIRE-RATED WALL CONSTRUCTION PRODUCT”; U.S.Patent Application Publication No. 2013/031856 A1 published Feb. 7, 2013to Don A. Pilz et al. assigned to California Expanded Metal ProductsCompany on a “FIRE-RATED WALL CONSTRUCTION PRODUCT”; U.S. Pat. No.8,281,552 B2 patented Oct. 9, 2012 to Don A. Pilz et al. assigned toCalifornia Expanded Metal Products Company on an “EXTERIOR WALLCONSTRUCTION PRODUCT”; U.S. Pat. No. 8,499,512 B2 patented Aug. 6, 2013to Don A. Pilz et al. assigned to California Expanded Metal ProductsCompany on an “EXTERIOR WALL CONSTRUCTION PRODUCT”; U.S. PatentApplication Publication No. 2013/0086859 A1 published Apr. 11, 2013 toDonald A. Pilz et al. assigned to California Expanded Metal ProductsCompany on a “FIRE-RATED WALL AND CEILING SYSTEM”; U.S. Pat. No.7,617,643 B2 patented Nov. 17, 2009 to Donald A. Pilz et al. assigned toCalifornia Expanded Metal Products Company on a “FIRE-RATED WALL ANDCEILING SYSTEM”; U.S. Pat. No. 7,950,198 B2 patented May 31, 2011 toDonald A. Pilz et al. assigned to California Expanded Metal ProductsCompany on a “FIRE-RATED WALL AND CEILING SYSTEM”; U.S. Pat. No.8,087,205 B2 patented Jan. 3, 2012 to Don A. Pilz et al. assigned toCalifornia Expanded Metal Products Company on a “FIRE-RATED WALL ANDCEILING SYSTEM”; U.S. Pat. No. 8,322,094 B2 patented Dec. 4, 2012 to DonA. Pilz et al. assigned to California Expanded Metal Products Company ona “FIRE-RATED WALL AND CEILING SYSTEM”; U.S. Pat. No. 7,752,817 B2patented Jul. 13, 2010 to Don A. Pilz et al. assigned to CaliforniaExpanded Metal Products Company on a “TWO-PIECE TRACK SYSTEM”; U.S. Pat.No. 8,132,376 B2 patented Mar. 13, 2012 to Don A. Pilz et al. assignedto California Expanded Metal Products Company on a “TWO-PIECE TRACKSYSTEM”; U.S. Pat. No. 8,413,394 B2 patented Apr. 9, 2013 to Don A. Pilzet al. assigned to California Expanded Metal Products Company on a“TWO-PIECE TRACK SYSTEM”; U.S. Pat. No. 8,555,566 B2 patented Oct. 15,2013 to Don A. Pilz et al. assigned to California Expanded MetalProducts Company on a “TWO-PIECE TRACK SYSTEM”; U.S. Patent ApplicationPublication No. 2011/214371 A1 published Sep. 8, 2011 to James A. Kleinassigned to Blazeframe Ind. Ltd. on an “OFFSET LEG FRAMING ELEMENT FORFIRE STOP APPLICATIONS”; U.S. Pat. No. 8,468,759 B1 patented Jun. 25,2013 to James A. Klein assigned to Blazeframe Ind. Ltd. on a “FIRERETARDANT COVER FOR FLUTED ROOF DECK”; U.S. Patent ApplicationPublication No. 2011/146180 A1 published Jun. 23, 2011 to James A. Kleinassigned to Blazeframe Ind. Ltd. on an “ACOUSTICAL AND FIRESTOP RATEDTRACK FOR WALL ASSEMBLIES HAVING RESILIENT CHANNEL MEMBERS”; U.S. PatentApplication Publication No. 2011/167742 A1 published Jul. 14, 2011 toJames A. Klein assigned to Blazeframe Ind. Ltd. on “HEAD-OF-WALLFIREBLOCK SYSTEMS AND RELATED WALL ASSEMBLIES”; U.S. Pat. No. 7,681,365B2 patented Mar. 23, 2010 to James A. Klein on “HEAD-OF-WALL FIREBLOCKSYSTEMS AND RELATED WALL ASSEMBLIES”; U.S. Pat. No. 7,814,718 B2patented Oct. 19, 2010 to James A. Klein on “HEAD-OF-WALL FIREBLOCKS”;U.S. Pat. No. 7,866,108 B2 patented Jan. 11, 2011 to James A. Klein on“HEAD-OF-WALL FIREBLOCK SYSTEMS AND RELATED WALL ASSEMBLIES”; U.S. Pat.No. 8,056,293 B2 patented Nov. 15, 2011 to James A. Klein on“HEAD-OF-WALL FIREBLOCK SYSTEMS AND RELATED WALL ASSEMBLIES”; U.S. Pat.No. 8,136,314 B2 patented Mar. 20, 2012 to James A. Klein on“HEAD-OF-WALL FIREBLOCKS”; U.S. Pat. No. 8,151,526 B2 patented Apr. 10,2012 to James A. Klein on “HEAD-OF-WALL FIREBLOCK SYSTEMS AND RELATEDWALL ASSEMBLIES”; U.S. Patent Application Publication No. 2012/0297710A1 published Nov. 29, 2012 to James A. Klein on “CONTROL JOINT BACKERAND SUPPORT MEMBER ASSOCIATED WITH STRUCTURAL ASSEMBLIES”; U.S. PatentApplication Publication No. 2011/0099928 A1 published May 5, 2011 toJames A. Klein and Alastair Malcolm on “DEFELCTION AND DRIFT STRUCTURALWALL ASSEMBLIES”; CA Patent Application Publication No. 2550201 A1published Dec. 15, 2007 to James A. Klein on “HEAD-OF-WALL FIREBLOCKSAND RELATED WALL ASSEMBLIES”; U.S. Pat. No. 8,181,404 B2 patented May22, 2012 to James A. Klein on “HEAD-OF-WALL FIREBLOCKS AND RELATED WALLASSEMBLIES”; U.S. Patent Application Publication No. 2013/0186020 A1published Jul. 25, 2013 to Don A. Pilz assigned to California ExpandedMetal Products Company on a “FIRE-RATED JOINT SYSTEM”; U.S. Pat. No.8,353,139 B2 patented Jan. 15, 2013 to Don A. Pilz et al. assigned toCalifornia Expanded Metal Products Company on a “WALL GAP FIRE BLOCKDEVICE, SYSTEM AND METHOD”; U.S. Patent Application Publication No.2013/118102 A1 published May 19, 2011 to Don A. Pilz et al. assigned toCalifornia Expanded Metal Products Company on a “WALL GAP FIRE BLOCKDEVICE; SYSTEM AND METHOD”; U.S. Patent Application Publication No.2013/205694 A1 published Aug. 15, 2013 to James P. Stahl assigned toSpecified Technologies Inc. on “INSULATING GASKET CONSTRUCTION FORHEAD-OF-WALL JOINTS”; U.S. Pat. No. 8,375,666 B2 patented Feb. 19, 2013to James P. Stahl et al. assigned to Specified Technologies Inc. on“FIRESTOPPING SEALING MENAS FOR USE WITH GYPSUM WALLBOARD INHEAD-OF-WALL CONSTRUCTION”; U.S. Patent Application Publication No.2013/091790 A1 published Apr. 18, 2013 to James P. Stahl et al. assignedto Specified Technologies Inc. on “FIRESTOPPING MEANS FOR USE WITHGYPSUM WALLBOARD IN HEAD-OF-WALL CONSTRUCTION”; U.S. Pat. No. 7,240,905B2 patented Jul. 10, 2007 to James P. Stahl on “METHOD AND APPARATUS FORSEALING A JOINT GAP BETWEEN TWO INDEPENDENTLY MOVABLE STRUCTURALSUBSTRATES”; U.S. Pat. No. 6,698,146 B2 patented Mar. 2, 2004 to MichaelD. Morgan et al. assigned to W.R. Grace & Co.-Conn. on “IN SITU MOLDEDTHERMAL BARRIERS”; U.S. Pat. No. 6,783,345 B2 patented Aug. 31, 2004 toMichael D. Morgan et al. assigned to W.R. Grace & Co.-Conn. on “IN SITUMOLDED THERMAL BARRIERS”; U.S. Pat. No. 7,043,880 B2 patented May 16,2006 to Michael D. Morgan et al. assigned to W.R. Grace & Co.-Conn. on“IN SITU MOLDED THERMAL BARRIERS”; U.S. Pat. No. 7,152,385 B2 patentedDec. 26, 2006 to Michael D. Morgan et al. assigned to W.R. Grace &Co.-Conn. on “IN SITU MOLDED THERMAL BARRIERS”; U.S. Pat. No. 5,010,702patented Apr. 30, 1991 to T. L. Daw et al. and assigned to DawTechnologies, Inc. on a “Modular Wall System”; and U.S. Pat. No.5,127,203 patented Jul. 7, 1992 to R. F. Paquette on a “Seismic/FireResistant Wall Structure and Method”; and U.S. Pat. No. 5,755,066patented May 26, 1998 to D. W. Becker on a “Slip Track Assembly; andU.S. Pat. No. 5,913,788 patented Jun. 22, 1999 to T. R. Herren on a“Fire Blocking And Seismic Resistant Wall Structure”; and U.S. Pat. No.5,921,041 patented Jul. 13, 1999 to J. D. Egri, II on a “Bottom TrackFor Wall Assembly”; and U.S. Pat. No. 5,950,385 patented Sep. 14, 1999to T. R. Herren on an “Interior Shaft Wall Construction”; and U.S. Pat.No. 6,058,668 patented May 9, 2000 to T. R. Herren on a “Seismic AndFire-Resistant Head-of-Wall Structure”; and U.S. Pat. No. 6,176,053patented Jan. 23, 2001 to Roger C. A. St. Germain and assigned to RobertC. A. St. Germain on a “Wall Track Assembly And Method For InstallingThe Same”.

Although the known fire block header tracks provide exceptionalperformance, there still exists a need for fire block arrangements thatcan be applied to any desired structure, such as the top of a stud wallassembly or to header tracks. Furthermore, as described herein,preferred embodiments of the wall gap fire blocks can be applied to awall bottom track to protect a foot-of-wall gap or a (vertical orhorizontal) gap in a location other than the head or foot of a wall. Inaddition, the intumescent material in the known fire block header trackspreferably is applied at the factory during the manufacturing process.In some circumstances, it may be desirable to apply the insulatingmaterial on site. Thus, certain preferred embodiments of the presentfire blocks are well-suited to application on the job site.

Preferred embodiments of the present invention provide an optionaladhesive insulating material strip that can be applied to a header trackor other head-of-wall structure to create a head-of-wall insulationblock, including, fire block. The adhesive insulation strip may includestrip portions of another material, among other material portions, ifdesired.

The insulating strip comprises at least one insulating material strip,optionally a cover layer that covers the insulating material strip andoptionally a support layer that covers the other surface of theinsulating material strip.

The insulating material strip will preferably include a fire-resistantmaterial or an acoustically insulating material. The term“fire-resistant material” shall include a non-inflammable material, aflame-proof material, that is flame-proof by itself, or a materialcomprising additives to make the material flame-proof. The materialshall form a stable ash crust in case of fire. The fire-resistantmaterials also may optionally include intumescent materials. Theseintumescent materials may be constructed partially or entirely from anintumescent material such as CP 646 from Hilti, for example. It also canbe made solely from an acoustical insulating material for applicationswhere sound transmissions are found to be desirable. Such acousticalinsulating configurations can preferably be formed of a felt acousticalinsulating material. Alternatively, it can be formed of a foamedinsulating material. It is also possible for the insulating material ofthe present invention to have components of both fire-resistant andacoustical sealing therewithin.

The insulating material may preferably be constructed partially orentirely from a pressure-resistant material such as acrylate basedpolymer or a hard putty such as rubber, e.g., polyisobutylene basedrubber. These materials may comprise a reinforcing member such as glassfibers or a glass fiber fabric to enhance strength of the material. Theterm “pressure-resistant” means that while installing the wallboard, thematerial shall be deformed only slightly so that in case of verticalmovement of the wallboard tilting and entanglement of the insulatingmaterial are always avoided.

In another embodiment the insulating material may be constructedpartially or entirely from a compressible material such as plasticines,fabric (non-woven or woven) or a felt, e.g., glass fiber braid, glassfiber fabric or glass fiber mat. Plasticines, which are also referred toas putties, are frequently used for this application. They generallyconsist of a liquid polymer such as butyl rubber, plasticizers (paraffinoil, phthalates, adipates, etc.) and fillers, with a filler content ofup to 80 percent. In particular the plasticine contains, as liquidpolymer, at least one representative of the group comprisingpolyurethanes, polyvinyl acetates, polyvinyl ethers, polyvinylpropionates, polystyrenes, natural or synthetic rubbers,poly((meth)acrylates) and homopolymers and copolymers based on(meth)acrylates, acrylonitrile, vinyl esters, vinyl ethers, vinylchloride and/or styrene, preferably poly(alkyl methacrylate), poly(alkylacrylate), poly(aryl methacrylate), poly(aryl acrylate) and/orcopolymers thereof with n-butyl acrylate and/or styrene. The plasticinemay comprise fire-protection additives. In this regard reference is madeto the U.S. patent application No. 2005/032934 A1 which is incorporatedin its entirety herein by reference.

More preferably the insulating material is also abrasive-resistant toresist abrasion caused by the wall member rubbing against the insulatingmaterial when moving up and down to movement of the building.

Enhanced strength or reinforcement of the material can be provided byincluding a reinforcing cover layer (hereinafter also referred to ascover layer) on one side of the insulating material. This is importantin particular when the insulating material strip itself is made from asoft and more or less compressible material. In case the insulatingmaterial is hard and pressure-resistant the facing member can beomitted. However, as a matter of precaution and for aesthetic reasons ahard and/or pressure-resistant material may also be provided with afacing member. Preferably the cover layer is made of anabrasion-resistant material to avoid abrasion resulting in loss of theinsulating material caused by repeatedly rubbing of the wallboard overthe insulating material. The cover layer can be a film material,preferably a synthetic film like plastic or poly-type material such aspolyalkylene material, for example polyethylene material. Alternativelythe cover layer can be a fabric made of abrasion-resistant fibers, likeglass fibers or any other suitable material. The cover layer providesprotection in the event that the wall is designed to accommodatevertical movement, which could result in the wallboard rubbing againstthe insulating material. However, the facing member still permits theinsulating material to expand in case it comprises an intumescentmaterial. In one embodiment the cover layer has a printable surface. Apositioning aid can be provided by including a mark in form of anoptionally colored line on the cover layer which helps to affix theinsulating strip on the header track in an ideal position. This may beimportant in case the insulating strip extends beyond the surface of theweb of the header track, in particular when the insulating strip isinstalled on site.

After having attached the insulating material to the track the coverlayer will constitute the outer surface of the material. The cover layerwill be in contact with either the ceiling or wallboard or both theceiling and the wallboard.

In case the insulating material will be positioned only or partially onthe web of the track, the cover layer can be omitted on the portion ofthe insulating material which is aligned with the web, since thematerial is secured to the ceiling by fixing the track to the supportstructure like the ceiling so that no movement between the ceiling orother part of the wall assemblies and the insulating material takesplace that would cause abrasion of the material.

In one embodiment the cover layer includes both the fabric and thesynthetic film, whereas preferably the film constitutes the outersurface of the insulating strip so that the fabric is positioned betweenthe insulating material and the synthetic film.

In each of the various embodiments the cover layer does not extendbeyond the insulation material. The cover layer is of the same size asthe insulating material or insulating material portion.

In one embodiment, a support layer covers one side of the insulatingmaterial. Preferably, the support layer and the cover layer arepositioned on opposite sides of the insulating material strip to coverthe insulating material strip so that the insulating material ispositioned between the support layer and the cover layer. The supportlayer is preferably of the same size as the insulating material strip.

In one embodiment the insulating strip includes two separate, i.e.,spatially separated insulating material strips so that the insulatingmaterial strips are arranged at a certain distance from each other, andincludes one support layer on which both insulating material stripsarranged. The insulating strip defines a track receiving areatherebeneath and is adapted to receive the header track or otherconstruction product therewithin. The support layer connects the twoinsulating material strips, whereas a middle portion of the supportmember is free of insulating material, i.e., does not have an insulatingmaterial positioned thereon. The distance between the two insulatingmaterial strips, i.e., the size of the middle portion of the supportlayer, depends on the width of the header track or other head-of-wallstructure to which the insulating strip shall be attached. If, forexample, the insulating strip shall be attached to only the legs of theheader track, the size of the support layer is adapted so that themiddle portion of the support member extends over the web of the headertrack.

The underneath surface of the insulating material strip or in case theinsulating strip includes a support layer the underneath surface of thesupport layer may include an adhesive, if desired. In the latter case,an adhesive may be provided on the underneath surfaces of both theinsulating material strip and the support layer. Preferably a removableprotective layer covers the underneath surface of the entire insulatingmaterial strip and/or the support layer until the insulating strip isready to be applied. In case the insulating material strip is made of asticky material such as soft or hard putty an adhesive will not benecessary since the material itself provides sufficient adhesive powerto the insulating strip.

In another embodiment the insulating strip comprises two insulatingmaterial strips positioned adjacent to one another, preferably in directabutment with each other (herein also referred to as two-part insulatingmaterial strip). In this arrangement, the insulating material may be ofany of the materials described above and may be same or different. Inone arrangement the insulating material is the same insulating material.In another arrangement the insulating strip is composed of two differentinsulating materials. Preferably the materials also differ in theirtexture so that, for example, an abrasion-resistant and optionally alsopressure-resistant material constitutes one part of the insulating stripand a soft, compressible material constitutes the other part. Forexample the insulating strip may be formed of an acrylate based polymerand the other part of the insulating strip may be formed of soft putty.

The cover layer may also be formed as a two-part layer, so that eachinsulating material is covered by a separate cover layer. Alternativelythe cover layer is formed as a single layer to cover both insulationmaterial portions.

It is to be understood that the cover layer as well as the support layerare only optional, and, therefore, not always necessary. Their usestrongly depends on the materials used for the insulating material anddepends on the type of application.

Moreover, various combinations of cover layer and support layer arepossible. In view of the embodiments discussed in more detail withreference to the examples, it is possible to use only a support layerwithout a cover layer; or to combine a continuous support layer with acover layer only on the pressure-resistant and/or abrasive-resistantmaterial portion, in particular where a combination of differentinsulating materials is used, in particular a combination of apressure-resistant and/or abrasive-resistant with a soft material (e.g.,soft putty); or to combine a continuous cover layer with a support layeronly on the pressure-resistant and/or abrasive-resistant material, inparticular where a combination of different insulating materials isused, in particular a combination of a pressure-resistant and/orabrasive-resistant with a soft material (e.g., soft putty). It iscontemplated that various aspects and features of the inventiondescribed can be practiced separately, combined together, or substitutedfor one another, and that a variety of combinations and subcombinationsof the features and aspects can be made and still fall within the scopeof the invention. Thus, it is intended that the scope of the inventionherein disclosed should not be limited by the particularly disclosedembodiments described above and below, but should be determined only bya fair reading of the claims.

The insulating strip can be applied to a header track or otherconstruction product, such as a bottom track, metal stud, metal flatstrap or any other framing member that needs an open gap between thewallboard and a perimeter structure, in particular for movement(deflection or drift) but not restricted thereto. In other words, theelongated insulating strip can be used for sealing any open gap betweenthe wallboard and the construction product or between the constructionproduct and a perimeter structure, like the support structure, forexample floor, side walls or ceiling. The insulating strip allows thegap to stay open for movement and provides fire and smoke protectionand/or sound reduction. Preferably, the insulating strip is applied sothat it wraps the upper corner of the header track or other head-of-wallstructure.

In one arrangement where the insulating strip comprises two insulatingmaterial strip portions one material strip portion may be positioned onthe top of the header track or other head-of-wall structure to provide asmoke, air and sound seal at the head-of-wall. The other material stripportion may be positioned on a side flange of the header track or sidesurface of the other head-of-wall structure so that the other materialportion is positioned between the header track or other head-of-wallstructure and the wallboard.

The compressible material strip portion may be positioned on the top ofthe header track or other head-of-wall structure to provide a smoke, airand sound seal at the head-of-wall. The pressure-resistant materialstrip portion may be positioned on a side flange of the header track orside surface of the other head-of-wall structure so that thepressure-resistant portion is positioned between the header track orother structure product and the wallboard.

A further detailed embodiment of the two-part material portioned stripis adapted and applied to a slotted header track having a plurality ofslots. The insulating material strip is divided into two materialportions which include different materials. Preferably the firstmaterial strip which shall align with the slotted portion of the leg ofthe header track includes a pressure-resistant and preferably also anabrasive-resistant material, for example an acrylate-based material. Thesecond material portion which shall align with the non-slotted upperportion of the leg of the header track preferably includes acompressible material, for example a putty or a foamed material. Bothmaterial portions may be covered by a cover layer. Preferably thematerial strips are provided with an adhesive (not shown) to secure thematerial strips to the support layer. In this embodiment, the firstmaterial strip portion is adapted to the slotted structure of the trackby subdividing the material strip portion into a plurality of smallstripes. This results in the material strip portion being interrupted byportions which are free of insulating material. In other words, theinsulating material portion includes alternating portions withinsulating material and portions free of insulating material. Thematerial stripes are aligned with the leg portions and fixed theretopreferably with an adhesive so that the portion of the material stripfree of insulating material is aligned with the slots. The materialstripes may be positioned parallel to the slots so that slots and stripsalternate. Alternatively the material stripes may also be positioned insuch a manner that the stripes diagonally cover the slots. In thisarrangement the screws with which the studs are movably fixed to theslotted header track may cut through the diagonal material stripesresulting in insulating remaining material sections on both sides of theslots which still assure sufficient sealing against smoke, fire andsound. In this embodiment the cover layer serves as the insulatingelement and serves as sealing.

The thickness of the material strip and with this also of the materialstripes depends on the screws or the like used to fix the studs to theheader track. Preferably the thickness of the insulating materialcorresponds to the thickness of the head of the screws protruding beyondthe leg, whereas movement of the screw still must be possible. Thisprovides sufficient sealing of the gap whilst ensuring at the same timea movement of the screws. The insulating strip may be installed beforeor after fixation of the header track and the studs. The insulatingstrip is positioned so that its top edge extends above the top surfaceof the web. In this configuration the insulating strip contacts thehorizontal support structure, e.g., a ceiling, and provides for enhancedsound and smoke containment especially in cases of an uneven or spawledhorizontal support structure surface. But the thickness highly dependenton the intended use of the insulation strip.

The above-described and other features, aspects and advantages of thepresent invention are described below with reference to drawings ofpreferred embodiments, which are intended to illustrate, but not tolimit, the invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 a is a cross-sectional view of a first embodiment of theinsulating strip assembly having certain features, aspects andadvantages of the present invention.

FIG. 1 b is a cross-sectional view of second embodiment of theinsulating strip assembly having certain features, aspects andadvantages of the present invention.

FIG. 1 c is a cross-sectional view of a third embodiment of theinsulating strip assembly having certain features, aspects andadvantages of the present invention.

FIG. 1 d is a cross-sectional view of a fourth embodiment of theinsulating strip assembly having certain features, aspects andadvantages of the present invention.

FIG. 2 is a cross-sectional view of a portion of a stud wall assemblywith the insulating strip assembly of FIG. 1 a installed at thehead-of-wall according to one embodiment of the present invention.

FIG. 3 is a cross-sectional view of a portion of a stud wall assemblywith the insulating strip assembly of FIG. 1 a installed at thehead-of-wall in an alternative way according to another embodiment ofthe present invention.

FIG. 4 is a cross-sectional view of a portion of a stud wall assemblywith the insulating strip assembly of FIG. 1 a installed at thehead-of-wall in an alternative way according to another embodiment ofthe present invention.

FIG. 5 is a cross-sectional view of a portion of a stud wall assemblywith the insulating strip assembly of FIG. 1 b installed at thehead-of-wall in an alternative way according to another embodiment ofthe present invention.

FIG. 6 is a cross-sectional view of a portion of a stud wall assemblywith the insulating strip assembly of FIG. 1 c installed at thehead-of-wall in an alternative way according to another embodiment ofthe present invention.

FIG. 7 is a cross-sectional view of an embodiment of a portion of a studwall assembly with the insulating strip assembly of FIG. 1 d installedat the head-of-wall in an alternative way according to anotherembodiment of the present invention.

FIG. 8 is a cross-sectional view of an embodiment of a portion of a studwall assembly with the insulating strip assembly of FIG. 1 c installedat the head-of-wall in an alternative way according to anotherembodiment of the present invention.

FIGS. 9 a and 9 b are side views of further embodiments of a portion ofa stud wall assembly having a slotted track with a similar insulatingstrip assembly shown in FIG. 1 b adapted to the slotted track installedat the head-of-wall according to another embodiment of the presentinvention.

FIG. 10 is a cross-sectional view of a further embodiment of a portionof a stud wall assembly with the insulating strip installed at thehead-of-wall according to FIGS. 9 a and 9 b according to anotherembodiment of the present invention.

DETAILED DESCRIPTION OF THE DRAWINGS

FIGS. 1 a to 1 d illustrate various types of an elongated insulatingstrip assembly 1, which is also referred to herein as an insulatingstrip, according to preferred embodiments of the present invention.

FIG. 1 a illustrates an elongated insulating strip assembly 1 accordingto a first embodiment of the present invention. The insulating strip 1is an elongate strip assembly that preferably is constructed as anintegrated assembly of multiple components. The insulating strip 1 maybe supplied on a roll, in a folded arrangement or any other suitablemanner. Preferably, the insulating strip 1 is provided as a separatecomponent that is applied to a head-of-wall in the field, as isdescribed in greater detail below.

The illustrated insulating strip 1 includes a fire-resistant materialstrip portion 2 (“insulating material strip 2”) and a support layer 3. Acover layer 4 covers the insulating material strip 2. The cover layer 4,however, does not include side portions that extend outwardly from theinsulating material strip 2. The cover layer 4 covers only theinsulating material strip 2. In such an arrangement, the insulatingstrip 1 may be secured to a construction product by an adhesive (notshown) applied to the bottom of the strip. An additional adhesive may beapplied to the upper face of the insulating material strip 2 to securethe insulating material strip 2 to the cover layer 4.

The insulating material strip 2 may be constructed from putty that mayadditionally contain intumescent additives or from an inorganic fibermaterial such as a felt, fabric or the like made from glass fibers. Incase the insulating material is made from putty, the putty may beprovided with a supporting structure, in particular internal supportingstructure, such as a web or fabric, in particular metal or glass fiberweb or fabric.

For the first embodiment the insulating material preferably is made fromputty, in particular soft putty, felt or felt like material.

Preferably, a removable protective layer (not shown) covers theunderneath surface of the insulating strip 1. The cover layer providesprotection in the event that the wall is designed to accommodatevertical deflection, which could result in the wallboard rubbing againstthe insulating material, leading to loss of insulating material forexample. In addition, the cover layer includes an adhesive layer (notshown) on the underneath side that faces the insulating material strip 2and protective layer. Thus, in some arrangements, the cover layer 4 is atape, such as a polypropylene tape, also referred to herein as polytape. Other suitable tapes may also be used. The cover layer 4 may beclear or somewhat clear so that the insulating material strip 2 isvisible through the cover layer 4 to ease assembly onto a header trackor other head-of-wall structure. In addition or in the alternative, amarking (such as a mark line) may be provided on the outer (upper)surface of the cover layer 4 to indicate the location of the edgebetween the web and the leg of the header track. The marking can be usedto locate the insulating strip 1 relative to the structure on which itis placed, such as the edge of a top or bottom track, for example.

FIGS. 1 b and 1 c illustrate elongated insulating strip assemblies 1according to a second (FIG. 1 b) and third (FIG. 1 c) embodiment of theinsulating strip 1 of the present invention, which are similar to theinsulating strip assembly 1 of FIG. 1 a. Accordingly, the same referencenumbers are used to indicate the same or similar components or featuresbetween these embodiments. According to the second embodiment shown inFIG. 1 b the intumescent material strip 1 is divided into two portions 2a and 2 b including different insulating materials. According to thethird embodiment shown in FIG. 1 c the intumescent material strip 1 isalso divided into two portions 2 a and 2 b but including the samematerial. The cover layer 4 may also be divided into two portions 4 aand 4 b as best shown in the encircled view in FIG. 1 b, which alsoholds for the cover layer 4 of the embodiment shown in FIG. 1 c.

FIG. 1 d illustrates an elongated insulating strip assembly 1 accordingto a fourth embodiment of the insulating strip 1 of the presentinvention, which is very similar to the insulating material stripassembly 1 of FIG. 1 c. The difference between the assembly of FIG. 1 cand FIG. 1 d is that the insulating strip 1 in FIG. 1 d comprises twoidentical two part material strips 2 including two part cover layers 4and a support layer 3 which supports both material strips 2.Accordingly, the width of the support layer 3 is more than twice thewidth of the support layer 3 of the insulating strip 1 shown in FIG. 1c. The insulating strip 1 shown in FIG. 1 d comprises a portion withoutan insulating material between the two portions, in particular the sideportions which comprise an insulating material.

FIG. 2 illustrates the insulating strip 1 of FIG. 1 a applied to ahead-of-wall structure including a header track 7 with a web 8 and legs9 extending downwardly from the web at opposite sides of the track and aplurality of studs (not shown). The insulating strip 1 is applied with aportion of the insulating strip 1 between the web 8 of the header track7 and the horizontal support structure 10 and a portion between one leg9 of the header track 7 and the wallboard 11. The insulating strip 1wraps one corner of the header track 7. As discussed above, theinsulating strip 1 may include a marking to assist in the properpositioning on the corner of the header track 7, such as a linearmarking, for example. Alternatively, the insulating strip 1 may comprisetwo separate insulating material portions 2 that are arranged onopposing edge sections of the support layer 3 (arrangement not shown),so that one insulating material portion will wrap one corner of theheader track 7 and the other insulating material portion 2 will wrap theother opposing corner of the header track 7.

As shown in FIG. 3 the insulating strip 1 of FIG. 1 a is affixedlengthwise on at least one, preferably both legs 9 of the header track7. The insulating strip 1 is positioned so that its top edge 5 does notextend above the top surface of the web 8. In this configuration theinsulating strip 1 does not necessarily contact the horizontal supportstructure 10, e.g., a ceiling. Preferably, the insulating strip 1 ispositioned so that its top edge 5 extents slightly above the top surfaceof the web 8 as is best shown in FIG. 4. In this configuration theinsulating strip 1 contacts the horizontal support structure 10, e.g., aceiling, and provides for enhanced sound and smoke containmentespecially in cases of an uneven or spawled horizontal support structuresurface.

This effect of enhanced sound and smoke sealing obtained by theconfiguration shown in FIG. 4 will further be enhanced in case theintumescent material strip 1 is configured as a two-part material stripas best shown in FIG. 5, i.e., the insulating material strip is dividedinto two portions 2 a and 2 b so that the two portions consists ofdifferent materials as shown in FIG. 1 b. Preferably, the insulatingmaterial strip portion 2 b includes a compressible material, for exampleputty or foam like material to better adapt to an uneven contour of thehorizontal support structure. More preferably, the insulating materialstrip portion 2 a includes a pressure-resistant material, which morepreferably additionally is abrasion-resistant, for example a hardsynthetic material on an acrylate basis. The insulating material stripportions 2 a and 2 b may on their surface include a cover layer 4 whichmay be a single layer that covers both insulating material stripportions 2 a and 2 b. Alternatively the cover layer 4 may also bedivided into two portions 4 a and 4 b (encircled view in FIG. 1 b; butnot shown in FIG. 5). In the latter case the cover layer portion 4 acovers the material strip portion 2 a and cover layer portion 4 b coversmaterial strip portion 2 b.

In addition to or in the alternative, the insulating strip 1 shown inFIG. 1 c which is divided into two portions 2 a and 2 b so that oneportion (e.g., 2 b) can be positioned on top of the header track 7, theweb 8, and the other portion (e.g., 2 a) can be positioned on the sideof the header track 7, the leg 9, as shown in FIG. 6. This configurationis very similar to the configuration shown in FIG. 2, with thedifference that the insulating strip 1 is the one which is shown in FIG.1 c. In this embodiment a cover layer may be omitted on the insulatingmaterial portion which is positioned on top of the web. Preferably anddepending on the material used the insulating material portion that ispositioned on the leg includes a cover layer to protect the insulatingmaterial, since this portion comes in direct contact with the wallboard.

FIG. 7 illustrates another embodiment of the invention, in which theinsulating strip shown in FIG. 1 d is applied to the header track 8. Inthis embodiment the insulating strip 1 comprises two separate insulatingmaterial portions that are arranged on opposing edge sections of thesupport layer 3 (see encircled section). Each insulating materialportion 2 and 2′ is divided into two portions 2 a, 2′a and 2 b, 2′ b sothat one part of the material portions (e.g., 2 b and 2′ b) can bepositioned on top of the header track 7, on the web 8, and the otherpart of the material portions (e.g., 2 a and 2′ a) can be positioned onthe side of the header track 7, on the leg 9. In this embodiment a coverlayer may be omitted on the insulating material portions that arepositioned on top of the web. Preferably and depending on the materialused, the insulating material portions that are positioned on the legeach include a cover layer to protect the insulating material, sincethese portions come in direct contact with the wallboards.

FIG. 8 illustrates a further positioning of the insulating strip 1 shownin FIG. 1 c, which arrangement is very similar to that shown in FIG. 3with respect to the insulating strip 1 shown in FIG. 1 a. The insulatingstrip 1 is affixed lengthwise on at least one, preferably both legs 9 ofthe header track 7. The insulating strip 1 is positioned so that its topedge 5 does not extend above the top surface of the web 8. In thisconfiguration the insulating strip 1 does not necessarily contact thehorizontal support structure 10, e.g. a ceiling. Alternatively, theinsulating strip 1 may also extend above the top surface of the 8 toachieve a better sealing against the horizontal support structure 10,similar to the arrangement shown in FIGS. 4 and 5.

FIG. 9 a illustrates a further embodiment of the insulating strip 1applied to a slotted header track 27 having a plurality of slots 30. Theinsulating strip 1 is very similar to the one shown in FIG. 1 b but isadapted to the slotted structure of the header track. The insulatingmaterial strip 2 of the insulating strip 1 is divided into two materialportions 2 a and 2 b which include different materials. Preferably thematerial strip 2 a includes a pressure-resistant and preferably also anabrasive-resistant material, for example an acrylate-based material. Thematerial portion 2 b preferably includes a compressible material, forexample, a putty or a foamed material. Both material portions 2 a and 2b are covered by a cover layer 4. The insulating strip 1 also includes asupport layer 3. Preferably the material strips are provided with anadhesive (not shown) to secure the material strips to the support layer3. In this embodiment, the material strip portion 2 a is adapted to theslotted structure of the track 27 by subdividing the material stripportion 2 a into a plurality of small stripes as best shown in FIG. 9 aso that the material strip portion 2 a is interrupted by portions freeof insulating material 2. In other words, the insulating materialportion 2 a includes alternating portions with insulating material andportions free of insulating material. The portions with insulatingmaterial are aligned with leg 29 portions so that the portion of thematerial strip 2 a free of insulating material is aligned with the slots30. The thickness of the material strip depends on the screws or thelike used to fix the studs (not shown) to the header track. Preferablythe thickness of the insulating material corresponds to the thickness ofthe head of the screws protruding beyond the leg 29, whereas movement ofthe screw still must be possible. This provides sufficient sealing ofthe gap whilst ensuring at the same time a movement of the screws. Theinsulating strip may be installed before or after fixation of the headertrack and the studs. The insulating strip 1 is positioned so that itstop edge 5 extends above the top surface of the web 28. In thisconfiguration the insulating strip 1 contacts the horizontal supportstructure (not shown), e.g., a ceiling, and provides for enhanced soundand smoke containment especially in cases of an uneven or spawledhorizontal support structure surface. The material stripes may also bepositioned on the support layer 3 in such a manner that the stripesdiagonally cover the slots 30 as best shown in FIG. 9 b.

Preferably the thickness of the insulating material 2 corresponds to thethickness of the head of the screws 31 protruding beyond the slotted leg29, whereas movement of the screws 31 still must be possible when thewallboard 11 is fixed to the studs 40 as best shown in FIG. 10. Theinsulating strip 1 is positioned so that its top edge extends above thetop surface of the web 28. In this configuration the insulating stripcontacts the ceiling 10, and provides for enhanced sound and smokecontainment especially in cases of an uneven or spawled horizontalsupport structure surface.

While particular embodiments of this invention have been shown in thedrawings and described above, it will be apparent that many changes maybe made in the form, arrangement and positioning of the various elementsof the combination. In consideration thereof, it should be understoodthat preferred embodiments of this invention disclosed herein areintended to be illustrative only and not intended to limit the scope ofthe invention.

The foregoing disclosure has been set forth merely to illustrate theinvention and is not intended to be limiting. Since modifications of thedisclosed embodiments incorporating the spirit and substance of theinvention may occur to persons skilled in the art, the invention shouldbe construed to include everything within the scope of the appendedclaims and equivalents thereof.

What is claimed is:
 1. An insulating strip, comprising: a support layer;and an insulating material strip secured to the support layer.
 2. Theinsulating strip according to claim 1, further comprising a coverdisposed on the insulating material strip.
 3. The insulating stripaccording to claim 2, wherein the insulating material strip is a puttywhich includes an intumescent additive and the cover is a tape.
 4. Theinsulating strip according to claim 1, wherein the insulating materialstrip is divided into a first portion and a second portion and wherein afirst insulating material of the first portion is different from asecond insulating material of the second portion.
 5. The insulatingstrip according to claim 1, wherein the insulating material strip isdivided into a first portion and a second portion and wherein the firstportion and the second portion are comprised of a same material.
 6. Theinsulating strip according to claim 2: wherein the insulating materialstrip includes a first insulating material strip part and a secondinsulating material strip part; wherein the first insulating materialstrip part and the second insulating material strip part are spacedapart from each other; wherein the cover includes a first cover part anda second cover part; and wherein the first cover part is disposed on thefirst insulating material strip part and the second cover part isdisposed on the second insulating material strip part.
 7. The insulatingstrip according to claim 6, wherein the first and the second insulatingmaterial strip parts have a same width.
 8. The insulating stripaccording to claim 1, wherein the insulating material strip includes afire-resistant material and/or an acoustically insulating material.
 9. Awall joint, comprising: a header track with a web and a leg; ahorizontal support structure disposed apart from the header track; andan insulating strip, wherein the insulating strip includes: a supportlayer; and an insulating material strip secured to the support layer;wherein the insulating strip is attached to the header track.
 10. Thewall joint according to claim 9, further comprising a cover disposed onthe insulating material strip.
 11. The wall joint according to claim 9,wherein a first portion of the insulating strip is attached to the webof the header track and wherein a second portion of the insulating stripis attached to the leg of the header track.
 12. The wall joint accordingto claim 9, wherein the insulating strip is attached to the leg of theheader track.
 13. The wall joint according to claim 12, wherein a topedge of the insulating strip does not extend above a top surface of theleg.
 14. The wall joint according to claim 12, wherein a top edge of theinsulating strip extends above a top surface of the leg.
 15. The walljoint according to claim 12: wherein the insulating material strip isdivided into a first portion and a second portion; wherein a firstinsulating material of the first portion is different from a secondinsulating material of the second portion; and wherein the first portionextends above a top surface of the leg and the second portion does notextend above the top surface of the leg.
 16. The wall joint according toclaim 9, wherein the insulating material strip is divided into a firstportion and a second portion, wherein the first portion and the secondportion are comprised of a same material, and wherein the first portionis attached to the web of the header track and wherein the secondportion is attached to the leg of the header track.
 17. The wall jointaccording to claim 10: wherein the insulating material strip includes afirst insulating material strip part and a second insulating materialstrip part; wherein the first insulating material strip part and thesecond insulating material strip part are spaced apart from each other;wherein the cover is not disposed on the second insulating materialstrip part; and wherein the first insulating material strip part isattached to the leg of the header track and the second insulatingmaterial strip part is attached to the web of the header track.
 18. Thewall joint according to claim 12, wherein the insulating material stripis divided into a first portion and a second portion and wherein thefirst portion and the second portion are comprised of a same material.19. The wall joint according to claim 9: wherein the header trackincludes slots and leg portions; wherein the insulating material stripis divided into a first portion and a second portion and wherein a firstinsulating material of the first portion is different from a secondinsulating material of the second portion; wherein the first portionincludes alternating portions with insulating material and portions freeof insulating material; and wherein the portions with insulatingmaterial are aligned with the leg portions and the portions free ofinsulating material are aligned with the slots.
 20. The wall jointaccording to claim 9, wherein the insulating material strip includes afire-resistant material and/or an acoustically insulating material.